Charles goodyear



" and also-of blcaehinglthe same and adaptingapplicable to. thatmaterial either in its natusheets or employed-ash. coveringto cloth orothcrsubs'tances; and I doherby declare thatthereof.

-'action of the 'acid- S0lllIl0ll,-lll0l especially cloth may inthis-case be united together at the ed ges and at thecenilsgseja-s tofor-m as'ort of bag;

capable of being dipped intothe metallic so.-

lution without its-interior being brought into contact therewith. I-hemetallic solutions are fuot by anynieaus equally'etfcctive indestroystronger acids being in all cases preferred as being perfect intheir ac-tio t'ercntwhat liind o't"metal'is' employed. The strong nitricacid undiluted: is that which I in general 'prelcr,.aud among the metalsI prefer eithcreoppcr or bismuth, forming a nitrate of'c'opper or anitrate 0t bismuth. as the'full eflccc' is produced by these'solntiousjufrom Y one tolive minutes. After the actiou is though 2'- to-beeoxn'p'lcte the article actedupon .is to he .wasl edwith water, so as toremove the whole d n -antes momma,

.i Q'FF c ADHESlVE PROPERTIES,- AND ALSO 0F BLEAC HI'NG THE SAME; ANDTllE R E BY A'DAPTING lT T0 VA RIO'US USEFIJL'PURPGSES. v

i S ecificationfiirniing pa'rl: of Letters Patent X5. 210, datedIrma-"1r, I537.

.To all idiom iLmuy emit-cm Beir known that I, (Silliness .Goopvsiin;of'the' city of New l'orlc, in the State of..\"ew York, have invented ordiscovered a new and improved mode or'proccss ol'divesting cao'ntchouc,guunclastic, or iudia-rubber of its adhesive properties, not only atthesurl'ace .-.hut.-. for some distance-below itfahd under certain icircumstances throughoutits whole-thickness,

it to'various useful purposes, which process is mlstate orafter it hasbeen dissolved in any o t'-t h'e known solvents thercoif and made intothe following=isa l'ullzu-nl exact description I employ the various/acidsolutions-of the metals, either sat urated or-partially satu rated andwith such metallic solution I wash over the surface of the caOutchOuc,of which I mean Q to destroy the adhesive property 3 or, instead l ofwashing the surface of. the caoutehouc, Ii dip it or the article coatedwith it into sucli'a solution. It the article is CldilgtiOiltCtl on oneside only with the solutimr it is'nccessary in general-to protect the.ucoated'-sidc from the whenthe more corrosive acids are used. The

ing' the adhcsiveuess of the.caoiitclioliqttlie,

nor is it indifot the acid SQltl'ilOll,'ftllt1 it will be found that"'in a less 'tion be? semhle that ol soft cloth, but that the surfacemay be worn iotf to a con'sidcmble depth and the new surface not'manifest: the slightest teudenc v.to adhesivcucss. It indeed so't'araltered in its properties as to resist to'a cou- 'siderable m n; theaction of those m'enstrua h v.\vhich it isorilinarily dissolved. Itniay,for example, be washed in spirits of turpen tine or intheoil ofsas'sat'n s without being rendered tacky, and it will equally resist theaction at soliir' oiaot' 'artiticial heat under all ordinary -.r empera'tures.

I have tlmst'ulLvdescribed what I believe tobethe best-modes of carryingu y'discovery into effect by the use of metallic solutions, and havesaid that they arenot equally ellicacious. Son c ot'them I am wellconvinced would not answer the'purposc at al-l as the acetate of lead,for example-and probably all the solutio'us of metals in the vegetableacids and there. are some Which will; produce the ell'cct:

but these are dilfere'uces which it is not necesperfce-t mariner thanthcnitrates which I have named,- or which will require a i much longertime for their complete action;

sayy or possible to particularize; neither are they essential to a fullknowledge of the means which I have adopted to produce the intendedeffect. I havcalso spoken of. dipping the ar--- ticlc to be acted uponinto a metallic solution,

or bf washing its surface therewith but other modes may ivedevised-ot'producing'the same 'cti'eet by means substantially the saine. I havesometimes covered the surface of the caout- CllOllC \Ylll1 the metallicpowder known by the.

the sonic efl'cet as the washing it u ithor dippiugitin thenit-tallicsolution, such a soluin this case immediately produced th'caction ot theacid npo'n-thc'metah. It is a common practice toaddscithe of. the ab--sorbeut earths or some pigment to 'the dissolvedieaontehouc,.anilwhenthis is done-the metallic solution may he rcadilyc made to op--erate'toa greater or less extent throughout the wholemassofasheet-ot'considerablc thickp Instcariolthepmcrssabovedcscrihcd,orprcnotonly the snrlaceof the caon-tchouc uftllre-v para (org to it, I con bincthecaoutc'houc with' lovving it to stand at rest,

' in a state fit for incorporation L have found this" earth prefer?-qiiicirlime,'as

ofthe others'in tittiugthe-sheleh aide to either ".inix and agitate itwith so much water-itsthat it shall not be thicker than-milk; when, onala'll the'ourser parin it, will rapidly-subside. containing the=tiuerparticles' is then to he pon-reii off and the tine lime allowed-tosubside. The \vaterlet't on the surface of'this being then poured oft,it iso'htaiued' ith the'eaoutu ot'.thiek paste into which nufactnrerpreparatory sheets ticl es contained The upper portion;

chouc in that fort it is brought by the ma to its beiugrolled'into vinvention is-5' -1 .'"Ihe destroying o potty h articles as have red outof the same material, and is rendered applicable to a va; riety of newpurposes hitherto unattempted; or attempted without snecess. 4

e'n mees ooom erin.

hiauce to sue een' mannfnctu little reseiu heretofore l) whole'thickness by the 'uiet ill-ie 01mm; but, "tie;o'r'iudia rnhber, but alsoto a'coiis i lerahle hesidest'his,thelilnehtis the'p'ropertyofhleael rextent helon the-sur'i nce, \vhether the some be 7 Iing' the caontehoucand of gifiu wit a, s'ur-'- inshcets uue juue'eted pith-cloth or other:snh- I 'faeeand-'testure uilapting it to the "receiving stances ot-'\rheu usjeillasfa coating therefor impressions.t'rouicopperpla'tes'or. by other by the-application tlreretdot' an acid',solution;uiodes of p rintiug; rendering i t 'either alone 1 ot'lthe ru'etnfs,substantially in the manner set: or when tus'edas-aeoatjng for cloth,applicable forth f. j r to the purpose(if-printing ehartsoriither de-The manner of preparing anilqineorpm; vices. I The taonteh'ouesoprepared with lime, rating'litue with the caoutchoue-paste {or the willhowever, be rendered adhesive by the acl-p'nrposeot' bleaching-it andgiving to the su'ets tion of heat or of solvents, unless the metallic aformed of -it n'colo'r and "texture adapting it solution'be appliedtoit, inii'hieh case much to receive printed imprcssiotis anH rendering ofthe whiteness eonnnunieated to it by the t it applicable to vnriousother. purposes, either bleaching property of the lime will disappear.without iii vvith the treatment by the metallic I however view indiscoveryot' the action 3 solutions, as herein set forth; of lime in theivay in which-I have applied it 3. .-\san eutirelynewmannmctn're,thesheetas of great importance, 'and"-thereiore proceed 5 caontehoucprepaied by the \vithiindescribed to' point out the manipulation ivhiehI have process of treatment by the metallic solutions; found necessary.to its successful use. I slack i a herein described, as it is therebyso'esseria. portion ot' the v finest i' iiieklimc, and then 3 tiaiiychanged in its properties as to-bear but

